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      1 /***
      2  * ASM: a very small and fast Java bytecode manipulation framework
      3  * Copyright (c) 2000-2007 INRIA, France Telecom
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. Neither the name of the copyright holders nor the names of its
     15  *    contributors may be used to endorse or promote products derived from
     16  *    this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
     22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     28  * THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 package org.mockito.asm.tree.analysis;
     31 
     32 import java.util.Set;
     33 
     34 import org.mockito.asm.tree.AbstractInsnNode;
     35 
     36 /**
     37  * A {@link Value} that is represented by its type in a two types type system.
     38  * This type system distinguishes the ONEWORD and TWOWORDS types.
     39  *
     40  * @author Eric Bruneton
     41  */
     42 public class SourceValue implements Value {
     43 
     44     /**
     45      * The size of this value.
     46      */
     47     public final int size;
     48 
     49     /**
     50      * The instructions that can produce this value. For example, for the Java
     51      * code below, the instructions that can produce the value of <tt>i</tt>
     52      * at line 5 are the txo ISTORE instructions at line 1 and 3:
     53      *
     54      * <pre>
     55      * 1: i = 0;
     56      * 2: if (...) {
     57      * 3:   i = 1;
     58      * 4: }
     59      * 5: return i;
     60      * </pre>
     61      *
     62      * This field is a set of {@link AbstractInsnNode} objects.
     63      */
     64     public final Set insns;
     65 
     66     public SourceValue(final int size) {
     67         this(size, SmallSet.EMPTY_SET);
     68     }
     69 
     70     public SourceValue(final int size, final AbstractInsnNode insn) {
     71         this.size = size;
     72         this.insns = new SmallSet(insn, null);
     73     }
     74 
     75     public SourceValue(final int size, final Set insns) {
     76         this.size = size;
     77         this.insns = insns;
     78     }
     79 
     80     public int getSize() {
     81         return size;
     82     }
     83 
     84     public boolean equals(final Object value) {
     85         if (!(value instanceof SourceValue)) {
     86         	return false;
     87         }
     88         SourceValue v = (SourceValue) value;
     89         return size == v.size && insns.equals(v.insns);
     90     }
     91 
     92     public int hashCode() {
     93         return insns.hashCode();
     94     }
     95 }
     96